feat: Enhance file input handling with dropzone support and improved image preview

Author: Acidicts

app/assets/stylesheets/application.css

@@ -511,7 +511,7 @@ a:hover {
 
 /* Footer */
 .retro-footer {
-  position: absolute;
+  position: sticky;
   width: 100%;
   color: var(--accent3);
   background: var(--main-900);